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00668 - Supply Voltage Terminal 30

00668 - Supply Voltage Terminal 30: Signal Outside Specifications

00668 - Supply Voltage Terminal 30: Implausible Signal

Possible Causes

  • Fuse(s) faulty
  • Wiring/Connectors from/to Control Module faulty
  • Power Supply (Battery/Generator) faulty

Possible Solutions

  • Check Fuse(s)
  • Check/Repair Wiring/Connectors from/to Control Module
  • Check Power Supply (Battery/Generator)

Special Notes

  • When found in an individual control module, it's most likely a local source (e.g. wiring/connectors).
  • When found in multiple control modules at the same time, it's most likely a common source (e.g. ground spot, battery, generator).
  • Intermittent codes are often stored during low outside temperature when the battery capacity goes down and may be ignored.